Dgca CPL Ground Classes are important for someone who is planning to do his Commercial Pilot training . In order to attain a Commercial Pilot license one has to go through two verticals of training - theoretical training and Practical flight training . These theoretical classes can be done at various pilot training institutes . This course helps a cadet to prepare for his Dgca CPL Written examination . Dgca generally conducts on demand examination every month these days . One has to score minimum of 70% in order to pass any DGCA CPL written exam . Thorough knowledge of CPL subjects help in safe conduct of flight operations , better understanding of rules and regulations , also helps you in clearing your Dgca exams quickly . Topics which you study as a part of this course are - General Navigation , flight instruments , radio navigation , mass and balance , performance , flight planning , Aviation meteorology , Air Regulations , Human factors , Aircraft ...